What apnoea-hypopnoea index (AHI) value range defines mild sleep apnea?

• A. <5 events/hour.
• B. 5-14 events/hour.
• C. 15-29 events/hour.
• D. ≥30 events/hour.

Answer: (B)

AHI shows how many breathing pauses or shallow breaths occur each hour of sleep, and this helps categorize how severe the sleep apnea is. The mild category sits just above the normal level but below the level that defines moderate sleep apnea. In other words, it’s the lower part of the abnormal range—more events than normal, but not enough to be considered moderate. This placement makes it the best match for mild sleep apnea, bridging the normal and moderate categories. The normal range is at or below the normal limit, moderate is a higher level, and severe is the highest level.